Abstract
The proton exchange membrane fuel cells, which have been extensively studied at present, have excellent performance but have a disadvantage of using expensive platinum catalysts. On the other hand, anion exchange membrane fuel cells have the advantage of using non-precious metal catalysts, and anion exchange membranes are a key component. An important component, anion exchange membranes, must have high electrochemical and mechanical properties. For the application of anion exchange membranes, poly(ether ether ketone)(PEEK) based copolymers containing imidazolium groups were synthesized. The synthesized PEEK had different contents of imidazolium group. To prepare the free standing films, PEEK containing various equivalents of imidazolium groups was dissolved in n-methyl-2-pyrrolidone (NMP). The films were then prepared with various PEEK solutions through a Petri dish and then the properties of the films were evaluated. The ion exchange capacity was measured by back-titration method and the ion conductivity was calculated by membrane resistance method. The TGA and UTM were used to investigate the thermal and mechanical properties of the various PEEK films.
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